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  <title>Constructs a new filesystem iterator</title>
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    <li>Constructs a new filesystem iterator</li>
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  <div id="layout-content"><div id="filesystemiterator.construct" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">FilesystemIterator::__construct</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.3.0, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">FilesystemIterator::__construct</span> &mdash; <span class="dc-title">Constructs a new filesystem iterator</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-filesystemiterator.construct-description">
  <h3 class="title">说明</h3>
  <div class="constructorsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><strong>FilesystemIterator::__construct</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$directory</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = FilesystemIterator::KEY_AS_PATHNAME | FilesystemIterator::CURRENT_AS_FILEINFO | FilesystemIterator::SKIP_DOTS</span></span>)</div>

  <p class="para rdfs-comment">
   Constructs a new filesystem iterator from the <code class="parameter">directory</code>.
  </p>

 </div>


 <div class="refsect1 parameters" id="refsect1-filesystemiterator.construct-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">directory</code></dt>

     <dd>

      <p class="para">
       The path of the filesystem item to be iterated over.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">flags</code></dt>

     <dd>

      <p class="para">
       Flags may be provided which will affect the behavior of some methods. 
       A list of the flags can found under <a href="class.filesystemiterator.html#filesystemiterator.constants" class="link">FilesystemIterator predefined constants</a>. 
       They can also be set later with <span class="methodname"><a href="filesystemiterator.setflags.html" class="methodname">FilesystemIterator::setFlags()</a></span>
      </p>
      <blockquote class="note"><p><strong class="note">注意</strong>: 
       <p class="para">
        <strong><code>FilesystemIterator::SKIP_DOTS</code></strong> is always set, and cannot
        be removed.
       </p>
      </p></blockquote>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 errors" id="refsect1-filesystemiterator.construct-errors">
  <h3 class="title">错误／异常</h3>
  <p class="para">
   Throws an <span class="classname"><a href="class.unexpectedvalueexception.html" class="classname">UnexpectedValueException</a></span>
   if the <code class="parameter">directory</code> does not exist.
  </p>
  <p class="para">
   Throws a <span class="classname"><a href="class.valueerror.html" class="classname">ValueError</a></span>
   if the <code class="parameter">directory</code> is an empty string.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-filesystemiterator.construct-changelog">
  <h3 class="title">更新日志</h3>
  <p class="para">
   <table class="doctable informaltable">
    
     <thead>
      <tr>
       <th>版本</th>
       <th>说明</th>
      </tr>

     </thead>

     <tbody class="tbody">
      <tr>
       <td>8.0.0</td>
       <td>
        Now throws a <span class="classname"><a href="class.valueerror.html" class="classname">ValueError</a></span> if
        <code class="parameter">directory</code> is an empty string;
        previously it threw a <span class="classname"><a href="class.runtimeexception.html" class="classname">RuntimeException</a></span>.
       </td>
      </tr>

     </tbody>
    
   </table>

  </p>
 </div>


 <div class="refsect1 examples" id="refsect1-filesystemiterator.construct-examples">
  <h3 class="title">范例</h3>
  <p class="para">
   <div class="example" id="example-3619">
    <p><strong>示例 #1 <span class="function"><strong>FilesystemIterator::__construct()</strong></span> example</strong></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$it&nbsp;</span><span style="color: #007700">=&nbsp;new&nbsp;</span><span style="color: #0000BB">FilesystemIterator</span><span style="color: #007700">(</span><span style="color: #0000BB">dirname</span><span style="color: #007700">(</span><span style="color: #0000BB">__FILE__</span><span style="color: #007700">));<br />foreach&nbsp;(</span><span style="color: #0000BB">$it&nbsp;</span><span style="color: #007700">as&nbsp;</span><span style="color: #0000BB">$fileinfo</span><span style="color: #007700">)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;echo&nbsp;</span><span style="color: #0000BB">$fileinfo</span><span style="color: #007700">-&gt;</span><span style="color: #0000BB">getFilename</span><span style="color: #007700">()&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>以上例程会输出：</p></div>
    <div class="example-contents screen">
<div class="cdata"><pre>
apples.jpg
banana.jpg
example.php
</pre></div>
    </div>
   </div>
  </p>
 </div>


 <div class="refsect1 seealso" id="refsect1-filesystemiterator.construct-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="methodname"><a href="filesystemiterator.setflags.html" class="methodname" rel="rdfs-seeAlso">FilesystemIterator::setFlags()</a> - Sets handling flags</span></li>
    <li class="member"><span class="methodname"><a href="directoryiterator.construct.html" class="methodname" rel="rdfs-seeAlso">DirectoryIterator::__construct()</a> - Constructs a new directory iterator from a path</span></li>
   </ul>
  </p>
 </div>

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